Metallurgical furnace



(No Model.) 2 SheetsShee.t 1.

W. ROTTHOFF.

v METALLURGICAL FURNACE. No 579,807. Patented Mar. 30, 1897.

(No Model") 2 Sheets-Shut 2.

W. ROTTHOPF. METALLURGICAL FURNACE.

No 579,807. Patented Ma.1-.30,1897.

NITED TATES union.

i ATENT METALLURGICAL FURNACE.

SPECIFICATION forming part of Letters Patent No. 579,807, dated March. 30, 1897. Application filed February 8,1896. Serial No. 577 ,825. (No model.)

To aZZ whom it may concern.-

Be it known that I, WILLIAM ROTTHOFF, of Duquesne, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Metallurgical Furnaces, of which the following is a full, clear and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a central vertical section of the lower portion of a blast-furnace constructed in accordance with my invention. Fig. 2 is a side elevation of one of the girders and one of the mantel-plates above the same; and Fig. 3 is a top plan view of the two girders, the outer one being in section on the line III III of Fig. 2.

My invention relates to the girders and mantel-plates employed in blast-furnaces and is designed to afford an improved construction of the same whereby the cooling-plates may be used in that portion of the bosh in front of the girders and the mantel-plates and are easily and quickly removed and replaced.

In the drawings, 2 represents the bosh of the blast-furnace, this bosh having built into it several annular series of outer hollow plates 3. These plates 3 are open at both ends and are somewhat larger than the water-cooled plates 4, which are pushed through the openended plate 3 into their position in the inner portions of the bosh, suitable inlet and outlet pipes being connected thereto, as shown at 5 in Fig. l. I do not, however, claim this form of cooling-plate herein, as the same is described and claimed in my copending application, Serial No. 577,824, filed February 3, 1896. Heretofore in placing these water-cooled boshplates in the boshes of blast-furnaces it has been found impossible to insert them in that zone of the bosh in front of the girders and the mantel-plates as there was not room between the girders and plates and the side of the furnace to insert or remove these plates. This difficulty I have entirely overcome by providing holes through the girders and mantel-plates, the cooling-plates being inserted and removed through these holes. Thus in the drawings I show the girders 6 Gas provided with apertures 7, which are of the same general shape and somewhat larger than the bosh-plates, which are shoved therethrough.

In the construction shown there are two series of plates in front of the girders, and the plates of one series are staggered relatively to the other, as shown in Fig. 2. The girders are plane-faced and when united together form a polygonal structure supporting the curved mantel-plates 8. At the corners or points of juncture of the girders there is room between the girders and the side of the furnace sufficient for the insertion of the plates, so that I do not form holes in the plates at such points, but insert and remove the cooling-plate from the space between the furnace and the joint. The inner of the girder-plates is of course slightly shorter than the outer plate, as shown in Fig. 3, and is provided with apertures similar to and registering with those in the outer girder. The curved mantel-plates 8, which rest upon the girders, are of hollow box form internally braced, and through them, in line with the plates 3, which fit snugly against their inner ends, extend openings 9, similar to those in the girders, and through which the cooling-plates are inserted. As shown in Fig. 2, I also provide for two rows of cooling-plates in front of the mantel-plates, the lower row being staggered with reference to the upper row, the outer plates 3 resting upon projecting lugs 10 at the sides of the openings. As there is no room at the juncture of these plates for the insertion of the cooling-plates, as in the case of the girders, these plates are provided at their'end with recesses which register with each other and form the openings at these points.

It will be understood that although I have shown two rows of cooling-plates in front of the girders and in front of the mantel-plates I do not wish to be limited thereto, as the plates and girders maybe extended vertically to any desired distance and anydesired number of plates used in front of them.

The advantages of my invention will be apparent to those skilled in the art. The

forming of the girders and mantel-plates with holes for the insertion of the cooling-plates therethrough enables me to cool that portion of the bosh which heretofore has been liable to be eaten away and finally to be broken out by the pressure of the stock and blast.

Many changes may be made in the particular type of the cooling-plates and the other parts Without departing from my invention, since 1. A blast-furnace provided with coolingplates in its sides and having its mantelplates provided with transverse openings adj aeent to and of sufiieient size to permit Withdrawal of said cooling-plates.

2. A blast-furnace, provided With mantelplates supporting its mantel and having the supporting-girders for the mantel-plates provided with openings through which coolingplates may be inserted, substantially as described.

3. A b1ast-furnace, having mantehplates supported upon girders, cooling-plates in its bosh in front of said girders and mantelplates, and apertures extending through the girders and mantel-plates in line with the cooling-p1ates, so that they may be removed therethrough; substantially as described.

In testimony whereof I have hereunto set my hand.

WILLIAM ROT' IIOFF.

Witnesses:

F. E. GAITHER, II. M. CQRWIN. 

